Iron-based phosphate sodium-ion battery positive electrode material drying vacuum equipment

Abstract

The utility model provides a kind of iron-based phosphate sodium-ion battery positive electrode material drying vacuum equipment, including device main body, heating mechanism, vacuum component and material processing component;The device main body includes vacuum chamber and support base, the vacuum chamber is fixedly installed above support base, and the top of vacuum chamber is equipped with inlet, and the bottom is equipped with discharge port;The heating mechanism includes built-in heating component and external heating component;The vacuum component includes vacuum pump, vacuum pipeline and vacuum buffer tank, the vacuum pump is connected with vacuum buffer tank by vacuum pipeline, and the vacuum buffer tank is communicated with vacuum chamber by vacuum pipeline;The material processing component includes stirring mechanism and dispersion mechanism, the stirring mechanism is set in the top of vacuum chamber, and the dispersion mechanism is set in the bottom of vacuum chamber, and the utility model structure design is novel. Efficient, uniform drying vacuum treatment of positive electrode material can be realized, and material preparation quality and production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sodium-ion battery material preparation equipment, and in particular to a vacuum drying device for iron-based sodium phosphate battery cathode material. Background Technology

[0002] Iron-based sodium phosphate batteries have become an important development direction in the field of large-scale energy storage due to their advantages such as low cost, high safety, and abundant resources. In the preparation of cathode materials, drying and vacuum treatment are key processes that directly affect the crystallinity, moisture content, and electrochemical performance of the materials. Excessive residual moisture in the material can lead to shortened battery cycle life, decreased rate performance, and even safety hazards.

[0003] Existing vacuum drying devices have the following shortcomings: First, most devices use a single heating method, resulting in poor heating uniformity and a tendency for localized overheating, leading to material agglomeration or component decomposition. Second, the connection structure between the vacuum system and the drying chamber is poorly designed, resulting in low vacuuming efficiency and the formation of dead air zones within the chamber, leading to incomplete material drying. Third, there is a lack of effective material stirring and dispersion mechanisms, causing material accumulation during batch processing, resulting in slow drying rates and poor consistency. Therefore, it is necessary to design a vacuum drying device for iron-based sodium phosphate battery cathode materials. Summary of the Invention

[0004] This invention provides a vacuum drying device for iron-based sodium phosphate battery cathode materials to solve the problems mentioned in the background art.

[0005] This utility model provides a vacuum drying device for iron-based sodium phosphate battery cathode materials, including a main body, a heating mechanism, a vacuum component, and a material handling component;

[0006] The main body of the device includes a vacuum chamber and a support base. The vacuum chamber is fixedly installed on the support base, and the top of the vacuum chamber is provided with a feed inlet and the bottom is provided with a discharge outlet.

[0007] The heating mechanism includes a built-in heating component and an external heating component. The built-in heating component is disposed inside the vacuum chamber, and the external heating component is wrapped around the outer wall of the vacuum chamber.

[0008] The vacuum assembly includes a vacuum pump, a vacuum pipeline, and a vacuum buffer tank. The vacuum pump is connected to the vacuum buffer tank via the vacuum pipeline, and the vacuum buffer tank is connected to the vacuum chamber via the vacuum pipeline.

[0009] The material handling assembly includes a stirring mechanism and a dispersing mechanism. The stirring mechanism is located at the top of the vacuum chamber, and the dispersing mechanism is located at the bottom of the vacuum chamber.

[0010] Preferably, the built-in heating assembly includes several sets of electric heating tubes and heat-conducting plates. The electric heating tubes are evenly distributed in a ring on the inner wall of the vacuum chamber. The heat-conducting plate has an arc-shaped structure, fits against the inner wall of the vacuum chamber and covers the electric heating tubes, and the surface of the heat-conducting plate is provided with several heat dissipation holes. The external heating assembly includes a heating sleeve and an insulation layer. The heating sleeve is wrapped around the outer wall of the vacuum chamber, and the insulation layer is wrapped around the outside of the heating sleeve.

[0011] Preferably, the stirring mechanism includes a stirring motor, a stirring shaft, and stirring blades. The stirring motor is fixedly installed on the outside of the top of the vacuum chamber. One end of the stirring shaft is connected to the output end of the stirring motor, and the other end extends into the vacuum chamber. The stirring blades are fixedly installed at the bottom of the stirring shaft, and the stirring blades have a spiral structure.

[0012] Preferably, the dispersion mechanism includes a dispersion motor, a dispersion shaft, and a dispersion disk. The dispersion motor is fixedly installed inside the support base. One end of the dispersion shaft is connected to the output end of the dispersion motor, and the other end extends to the bottom of the vacuum chamber. The dispersion disk is fixedly installed on the top of the dispersion shaft, and the surface of the dispersion disk is provided with several dispersion teeth.

[0013] Preferably, the vacuum pipeline is equipped with a vacuum valve and a vacuum filter. The vacuum filter is located on the vacuum pipeline between the vacuum buffer tank and the vacuum chamber, and the vacuum filter contains a ceramic filter element.

[0014] Preferably, the bottom of the support base is provided with shock-absorbing pads, which are made of rubber, and the support base is provided with sound insulation cotton.

[0015] Beneficial effects:

[0016] (1) The present invention has a novel structural design. It can achieve efficient and uniform vacuum drying of cathode materials, thereby improving the quality of material preparation and production efficiency.

[0017] (2) This utility model achieves uniform temperature distribution in the vacuum chamber through a dual heating structure of built-in annular electric heating tube and external heating jacket, avoiding local overheating that could lead to material clumping or decomposition. At the same time, the insulation layer reduces heat loss and improves heating efficiency.

[0018] (3) The spiral blades of the stirring mechanism of this utility model cooperate with the dispersing teeth of the dispersing mechanism to achieve full dispersion and tumbling of materials, avoid accumulation, and improve drying uniformity and rate.

[0019] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 Top view of the built-in heating component of this utility model;

[0023] Figure 3 This is a top view of the external heating component of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0026] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] Please see Figures 1-3 This utility model discloses a vacuum drying device for iron-based sodium phosphate battery cathode material, including a main body, a heating mechanism, a vacuum component and a material handling component;

[0029] The main body of the device includes a vacuum chamber 1 and a support base 2. The vacuum chamber 1 is fixedly installed on the support base 2, and the top of the vacuum chamber 1 is provided with a feed inlet 3 and the bottom is provided with a discharge outlet 4.

[0030] The heating mechanism includes a built-in heating component and an external heating component. The built-in heating component is disposed inside the vacuum chamber 1, and the external heating component is wrapped around the outer wall of the vacuum chamber 1.

[0031] The vacuum assembly includes a vacuum pump 5, a vacuum pipe 6, and a vacuum buffer tank 7. The vacuum pump 5 is connected to the vacuum buffer tank 7 through the vacuum pipe 6, and the vacuum buffer tank 7 is connected to the vacuum chamber 1 through the vacuum pipe 6.

[0032] The material handling assembly includes a stirring mechanism and a dispersing mechanism. The stirring mechanism is located at the top of the vacuum chamber 1, and the dispersing mechanism is located at the bottom of the vacuum chamber 1.

[0033] In this invention, the built-in heating assembly includes several sets of electric heating tubes 8 and heat-conducting plates 9. The electric heating tubes 8 are evenly distributed in a ring on the inner wall of the vacuum chamber 1. The heat-conducting plates 9 have an arc-shaped structure, are attached to the inner wall of the vacuum chamber 1 and cover the electric heating tubes 8, and have several heat dissipation holes on their surface. The external heating assembly includes a heating sleeve 10 and an insulation layer 11. The heating sleeve 10 is wrapped around the outer wall of the vacuum chamber 1, and the insulation layer 11 is wrapped around the outside of the heating sleeve 10. This invention achieves uniform temperature distribution within the vacuum chamber through the dual heating structure of the built-in ring-shaped electric heating tubes and the external heating sleeve, avoiding local overheating that could lead to material agglomeration or decomposition. At the same time, the insulation layer reduces heat loss and improves heating efficiency.

[0034] In this invention, the stirring mechanism includes a stirring motor 12, a stirring shaft 13, and stirring blades 14. The stirring motor 12 is fixedly installed on the outer top of the vacuum chamber 1. One end of the stirring shaft 13 is connected to the output end of the stirring motor 12, and the other end extends into the vacuum chamber 1. The stirring blades 14 are fixedly installed at the bottom of the stirring shaft 13 and have a spiral structure. The dispersing mechanism includes a dispersing motor 15, a dispersing shaft 16, and a dispersing disk 17. The dispersing motor 15 is fixedly installed inside the support base 2. One end of the dispersing shaft 16 is connected to the output end of the dispersing motor 15, and the other end extends into the bottom of the vacuum chamber 1. The dispersing disk 17 is fixedly installed on the top of the dispersing shaft 16, and the surface of the dispersing disk 17 is provided with several dispersing teeth 18. The spiral blades of the stirring mechanism can tumble the material up and down, and the dispersing teeth of the dispersing mechanism can break up the accumulated material. The combination of the two can ensure that the material is fully dispersed during the drying process, improving the drying uniformity and rate.

[0035] In this invention, a vacuum valve 19 and a vacuum filter 20 are provided on the vacuum pipeline 6. The vacuum filter 20 is located on the vacuum pipeline between the vacuum buffer tank 7 and the vacuum chamber 1, and a ceramic filter element is provided inside the vacuum filter 20. The vacuum buffer tank can prevent pressure shocks to the vacuum chamber when the vacuum pump starts and stops. The vacuum filter can prevent positive electrode material powder from entering the vacuum pipeline and the vacuum pump, extending the service life of the equipment. The two-stage rotary vane vacuum pump can ensure that the vacuum chamber quickly reaches the required vacuum level and maintains stability.

[0036] In addition, the bottom of the support base 2 is equipped with shock-absorbing pads 21, which are made of rubber, and the support base 2 is also equipped with sound-insulating cotton. The shock-absorbing pads and sound-insulating cotton can reduce vibration and noise during equipment operation.

[0037] Working Principle: During operation, the iron-based sodium phosphate battery cathode material to be processed is first fed into the top inlet of the vacuum chamber, and then the inlet is closed. The heating jacket of the external heating component and the electric heating tube of the internal heating component are activated. The external heating jacket surrounds the outer wall of the chamber for heating, while the internal annular electric heating tube evenly transfers heat into the chamber through an arc-shaped heat-conducting plate with heat dissipation holes. The insulation layer reduces heat loss, achieving a uniform and stable chamber temperature. Simultaneously, the vacuum pump is activated, drawing air from the chamber through vacuum pipes and a vacuum buffer tank. The buffer tank prevents pressure surges, and the vacuum filter prevents material powder from entering the pipes and pump body. Vacuum valves control the vacuuming process, allowing the chamber to quickly reach the required vacuum level. The stirring motor of the top stirring mechanism drives the stirring shaft and spiral blades to agitate the material; the dispersion motor of the bottom dispersion mechanism drives the dispersion shaft and dispersion disc with dispersion teeth to break up the accumulated material. Under this dual action, the material fully contacts the heat, moisture evaporates efficiently and is extracted by the vacuum pump, and the dried material is discharged from the bottom outlet.

[0038] In summary, this utility model features a novel structural design. It enables efficient and uniform vacuum drying of cathode materials, improving material preparation quality and production efficiency.

[0039] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vacuum drying device for iron-based sodium phosphate battery cathode materials, characterized in that, Includes the main body of the device, heating mechanism, vacuum components, and material handling components; The main body of the device includes a vacuum chamber (1) and a support base (2). The vacuum chamber (1) is fixedly installed on the support base (2), and the top of the vacuum chamber (1) is provided with a feed inlet (3) and the bottom is provided with a discharge outlet (4). The heating mechanism includes a built-in heating component and an external heating component. The built-in heating component is disposed inside the vacuum chamber (1), and the external heating component is wrapped around the outer wall of the vacuum chamber (1). The vacuum assembly includes a vacuum pump (5), a vacuum pipe (6), and a vacuum buffer tank (7). The vacuum pump (5) is connected to the vacuum buffer tank (7) through the vacuum pipe (6), and the vacuum buffer tank (7) is connected to the vacuum chamber (1) through the vacuum pipe (6). The material handling assembly includes a stirring mechanism and a dispersing mechanism. The stirring mechanism is located at the top of the vacuum chamber (1), and the dispersing mechanism is located at the bottom of the vacuum chamber (1).

2. The vacuum drying equipment for iron-based sodium phosphate battery cathode materials according to claim 1, characterized in that, The built-in heating assembly includes several sets of electric heating tubes (8) and heat-conducting plates (9). The electric heating tubes (8) are evenly distributed in a ring on the inner wall of the vacuum chamber (1). The heat-conducting plates (9) have an arc-shaped structure, fit against the inner wall of the vacuum chamber (1) and cover the electric heating tubes (8). The surface of the heat-conducting plates (9) is provided with several heat dissipation holes. The external heating assembly includes a heating sleeve (10) and a heat insulation layer (11). The heating sleeve (10) is wrapped around the outer wall of the vacuum chamber (1), and the heat insulation layer (11) is wrapped around the outside of the heating sleeve (10).

3. The vacuum drying equipment for iron-based sodium phosphate battery cathode materials according to claim 1, characterized in that, The stirring mechanism includes a stirring motor (12), a stirring shaft (13), and stirring blades (14). The stirring motor (12) is fixedly installed on the outside of the top of the vacuum chamber (1). One end of the stirring shaft (13) is connected to the output end of the stirring motor (12), and the other end extends into the vacuum chamber (1). The stirring blades (14) are fixedly installed at the bottom of the stirring shaft (13), and the stirring blades (14) have a spiral structure.

4. The vacuum drying equipment for iron-based sodium phosphate battery cathode materials according to claim 1, characterized in that, The dispersion mechanism includes a dispersion motor (15), a dispersion shaft (16), and a dispersion disk (17). The dispersion motor (15) is fixedly installed inside the support base (2). One end of the dispersion shaft (16) is connected to the output end of the dispersion motor (15), and the other end extends to the bottom of the vacuum chamber (1). The dispersion disk (17) is fixedly installed on the top of the dispersion shaft (16), and the surface of the dispersion disk (17) is provided with several dispersion teeth (18).

5. The vacuum drying equipment for iron-based sodium phosphate battery cathode materials according to claim 1, characterized in that, The vacuum pipe (6) is equipped with a vacuum valve (19) and a vacuum filter (20). The vacuum filter (20) is located on the vacuum pipe between the vacuum buffer tank (7) and the vacuum chamber (1), and the vacuum filter (20) is equipped with a ceramic filter element.

6. The vacuum drying equipment for iron-based sodium phosphate ion battery cathode material according to claim 1, characterized in that, The bottom of the support base (2) is provided with shock-absorbing pads (21), which are made of rubber, and the support base (2) is provided with sound insulation cotton inside.

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